Answers

Add 81/54 and 42/7

1^st number: 1 27/54, 2^nd number: 6 0/7

81/54 + 42/7 is 15/2.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 7 is 378
   
   Next, find the equivalent fraction of both fractional numbers with denominator 378
2. For the 1st fraction, since 54 × 7 = 378,
   81/54 = 81 × 7/54 × 7 = 567/378
3. Likewise, for the 2nd fraction, since 7 × 54 = 378,
   42/7 = 42 × 54/7 × 54 = 2268/378
4. Add the two like fractions:
   567/378 + 2268/378 = 567 + 2268/378 = 2835/378
5. 2835/378 simplified gives 15/2
6. So, 81/54 + 42/7 = 15/2
   In mixed form: 71/2

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